Annual report pursuant to Section 13 and 15(d)

Net (Loss) Income Per Share - Additional Information (Detail)

v2.4.1.9
Net (Loss) Income Per Share - Additional Information (Detail)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Earnings Per Share [Abstract]      
Shares excluded from dilutive shares outstanding because their effect was anti-dilutive 1,273,889us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 1,058,334us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 644,299us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount